Welcome to NPR's Stream! Iowa's process of picking its choice for president is complicated, but we're here to help. We'll be here all night. You can see live results and tune into NPR's special coverage of caucus night beginning at 8 p.m. CT/ 9 p.m. ET at elections.npr.org.

Bernie Sanders spoke:

DES MOINES, IA - FEBRUARY 01: Supporters cheer during Democratic presidential candidate Sen. Bernie Sanders' (I-VT) caucus night party February 1, 2016 in Des Moines, Iowa. Sanders and former Secretary of State Hillary Clinton were locked in a tight race with caucus goers late in the evening. (Photo by Alex Wong/Getty Images)

DES MOINES, IA - FEBRUARY 01: Democratic presidential candidate former Secretary of State Hillary Clinton speaks to supporters as Former U.S. president Bill Clinton and daughter Chelsea Clinton look on during her caucus night event in the Olmsted Center at Drake University on February 1, 2016 in Des Moines, Iowa. Clinton defeated Democratic presidential candidate Sen. Bernie Sanders (I-VT) to win the Iowa Democratic caucus. (Photo by Justin Sullivan/Getty Images)